Verifying GnuPG-signed documents with PGP 5.0i

[Werner Koch]

nb@thinkcoach.com writes:

>   I have tried to verify GnuPG-signed documents with PGP 5.0i,

5.0i is very old and very buggy. 

> (the newest available international version of PGP for unix

Hmmm, it is nearly 2 years old.

> - However, when I merely do 'gpg -s' or 'gpg -a -s', then PGP
>   dies with signal 11 (segmentation violation).

Did you keep the --force-v3-sigs in your options file?

> since GnuPG claims to be compatible with PGP, it appears to
> me that GnuPG needs some more work in this area also.

Well, it does not claim to be compatible with PGP 5 or whatever but
to be an OpenPGP implementaion.  PGP 5.x is far away to be in
compliance with RFC2440 and 6 has still some problems with OpenPGP.

Your message uses compression algorithm 2 which pgp 5 does not understand,
if you would have encrypted to someone elses key (created by pgp5.0), gpg
would have use algorithm 1 because algo 2 is probably not listed in the
recipients compress algo preferences.  But if you don't encrypt, gpg
uses a default algorithm.  Compress algorithm yields better compression
rates than 1.  

You can override this with the option --compress-algo 1 or don't use
compression at all (-z 0)


-- 
Werner Koch at guug.de           www.gnupg.org           keyid 621CC013